<?php
function dopages($curent_page, $totalcontent, $perpage){
    $totalpages = $totalcontent / $perpage;

    if($curent_page !== 1){
        $preid = $curent_page - 1;
        $output .= '<a href="'.$preid.'">Previous</a> ';
    }

    while ( $counter <= $totalpages ) {
        if($counter == $curent_page){
            $output .= '<a href="'.$counter.'"><b>'.$counter.'</b></a> ';
        }else {
            $output .= '<a href="'.$counter.'">'.$counter.'</a> ';
        }
        $counter = $counter + 1;
    }

    if($curent_page !== $totalpages){
     $neid = $curent_page + 1;
        $output .= '<a href="'.$neid.'">Next</a> ';
    }


    return $output;
}  
?>

//usage
<? echo dopages(1, 80, 20); ?>

Couldent find a pre-made function with a simple pagination.

$curent_page Is what page number you are currently on.
$totalcontent Is how many rows you have in your database
$perpage Is how many rows you display per page.

simple pagination

PHP